1\\frac{3}{4}\\times\\frac{20}{21}=

Explanation:

Step1: Convert mixed - number to improper fraction

$1\frac{3}{4}=\frac{4\times1 + 3}{4}=\frac{7}{4}$

Step2: Multiply the fractions

$\frac{7}{4}\times\frac{20}{21}=\frac{7\times20}{4\times21}$

Step3: Simplify the fraction

$\frac{7\times20}{4\times21}=\frac{7\times4\times5}{4\times7\times3}=\frac{5}{3}=1\frac{2}{3}$

Answer:

$1\frac{2}{3}$